Hakka Commercial Planetary Mixers 3 Funtion Stainless Steel Food Mixer (20 Quart(M20A)) Commercial mixer is gear driven with 3 speeds Includes safety guard, stainless steel wire whip, stainless steel flat beater, stainless steel dough hook and stainless steel mixing bowl A hardened steel worm and alloy bronze worm gear transmits power to motor transmission Equipped with a safety guard.